So, what do I need to add USB to my 2009 328i with Pro Audio Head Unit? It now has an AUX In in the console. All I want is to add the USB flash drive reader capability - no mic or Bluetooth for a phone.

Looks like I need to buy these part numbers:

84109237653 USB-Aux Socket
61119129360 Coaxial fakra wire for USB

Do I need to code the radio? If I do, what OBD unit, and what software for Win7?

Thanks for any help!

You better should to remove it before buying the parts and see if there is a white empty connector behind it and a Bluetooth logo on the top of the HU.

I think your hu is not USB capable... better check it.

If you are lucky, order only the parts you said (buy the mic and the wires for it too... more features, better car )